youspend a lot of time looking for the lost child—________. It took us half a month, butluckily we found him.

Most young people don’t want _____ the kind of life that their parents ______.[ ]

How often do you clean your room— .

Did you notice someone enter the classroom just now—Sorry, I didn’t. I _____ my lessons at that time.

We all think he is one of _________ in our school.